S2E5: We need moar speed Capt’n!. Comet 40/44 series modifications gone wrong

Season 2 Episode 5
In this episode Jimbo does some more testing of the fuel injected 420cc hemi cement mixer powered street legal go-cart. No everything goes as planned. Also, Jimbo answers some viewers question from previous videos. There is a surprise! Be sure to watch!
Check out season 1 and it won't disappoint.
And by-the-way, our new building needs some wall swag so feel free to be creative when you send bits and bobs to:

[@yoshidis4]

In performance scooter tuning (they also have CVT) they usually look for very fast RPM climb and RPM no dip at all. Constant high RPM throught is the aim, to keep the RPM where the engine is more powerful.

[@JohnDoe-fk6id]

Yup. You want to get to peak power RPM as quickly as possible, and hold it there, until you run out of CVT range.

[@Surestick88]

Agreed. rpm should climb to peak HP rpm as the clutch engages, hold it there as the CVT shifts through its range, then climb to redline. That way you get the most time at peak power and most "area under the curve".

[@mmllmmll22]

I'd use lighter rolls(idk how it's in english, weights inside 1st stage of CVT) to allow engine to stay in upper rpm's, also check clutch in cvt & use 4th gear :D

[@ThePa1ch]

@blacknester nope - only clutch burn is the horizontal section of the graph. Before the first peak is good solid acceleration in lowest cvt gear.

[@TheStuartstardust]

@@mmllmmll22 this yes! You change spring to avoid slipping ie. this is you belt tensioner. Too powerful spring and you waste power, too little you burn the belt and also waste power. Then you adjust rollers to shift at right rpm. Reducing the weight will increase rpm, but the slope they run in also have an effect. This is not flat, but has a progressive slope. Also sligt lubricant might protect the rolles from getting flat spots which really make the tunning hard, as rpm setpoint will move around. 🤓 At least that is how the belt CVT I have worked on works. 🙂🙃

[@Averna222]

This is one of the last channels I ever expected a portal reference from.

[@sinformant]

Ikr! it came out of left field!

[@vegasquare]

When life gives you lemons…..

[@ocdman202]

@@vegasquare Quick opinion question Do you think JIMBO needs a Robot??

[@kansasrose2909]

@@ocdman202 Well, he should consider it. 👾👾👾👾

[@kansasrose2909]

If he gets a Robot he should name it VOLT taren.

[@chubbysumo2230]

with that 670cc, you have officially exceeded Kei regulations sir.

[@aimlessweasel]

The bass drop with the 670 bigger big block was hilarious. Also "petrol for the metric crowd..." Thanks for all the great videos.

[@thromboid]

I read "gas mileage" in a paper the other day and thought "oh, you mean fuel economy", but then I realised the real equivalent would have been "petrol kilometrage". :D

[@kansasrose2909]

@@thromboid I love that equivalent phrase == Petrol Kilometrage.. Fantastic!⛽⛽⛽

[@ocdman202]

@@kansasrose2909 😃😃😃

[@christristano5034]

Thank you Jimbo! You have awesome tact in explaining why our ideas don’t work. Still learning a lot. Wasn’t expecting the bigger block yet. That thing is huge.

[@kansasrose2909]

Jimbo does have a lot of tact in explaining.. I am also learning alot. ☺☺

[@I_Do_Cars]

Woooo boy, a Vtwin! I have seen supercharged 670's do some wild things. I'm not saying you should go that route but merely informing you that route is a route indeed. Loved this episode not only because you set the record straight about generators vs alternators, but because there are so many exciting things coming! New engine, supercharger, and new vehicle? Amazing. Also, if you need, or want another transmission for your Honda, you may know a guy who is in the used auto parts industry. :)

[@ocdman202]

YES TO NEW ... New engine, supercharger and new vehicle.. What will happen next?? JIMBO OF ROBOT CANTINA is one to watch.🤓

[@mommapanda5736]

@@ocdman202 Yes to new engine or motor.. Many exciting things to look forward to hopefully in future videos...

[@robotcantina8957]

Thanks! The 670 should get us to 70 Miles per hour no problem, although It ain't going to fit under the hood. I want to get back to simple projects, the EFI and the Stupid charger seems a little much. but we will follow through with them. I think the 670 will get a little something something, but we wont get to crazy. The trans for this insight is a bit of an oddball. I took a lot of parts off of it in order to make it work. Most of the extra parts got scrapped :( I'm not sure what would be better, a replacement transmission or a whole parts car.... or a different type of car.

[@stubby7934]

@@LazloNQ 500-800lbs heavier, depending on trim.

[@gasolinefumes]

@@robotcantina8957 the 2003-2005 Honda Civic Hybrid 5-speed trans will work and is easier to find. Slightly different gearing.

[@ThePa1ch]

The flat section is clutch slip, the next rise is engine accelerating in low cvt gear, the dip is the cvt doing its thing and transitioning to high gear, slowing the engine. The next rise is the cvt in highest gear. The CVT is moving to a high gear too fast...

[@kansasrose2909]

This is an interesting comment.. what leads you to believe the cvt is moving to a high gear too fast??

[@ThePa1ch]

@@kansasrose2909 The dip in RPM in the middle of the run is the cvt shifting to a high gear. The cvt moves based on output speed. The engine moves out of the power band. The ideal situation would be no dip in RPM: the engine maintaining the RPM at which it makes peak power. This would mean the CVT operating more slowly and for a longer period of time. As it is it's like a manual transmission car accelerating for a bit and then shifting straight from 1st to 5th gear, RPM suffering and then waiting for RPM to pick up again.

[@kansasrose2909]

@@ThePa1ch Thank you so much for this comment.. I really appreciate your input. 🌹🌹🌹

[@billdont2458]

I replied in the main section about belt slippage. But I think you're on the money here.

[@ThePa1ch]

@@billdont2458 There's no belt slip, the flat line is the centrifugal clutch engaging though.

[@dannycarter8207]

Geo tracker 4x2! Light and lots of room. Keep em coming.

[@howiefeltersnatch2973]

I'm going over to Cars and Cameras comment section to name drop your channel and hopefully get you some more viewers/money for this awesome project. Do you miss Michigan yet?

[@kansasrose2909]

Here is a thumbs up for Cars and Cameras..👍👍👍

[@Bigshooterist]

I think I look forward to each installment more than I should. I don't have any similar projects underway, nor can I see where the knowledge will help me in the near future, but I'll be dammed if I can't wait for each episode to hit. I love the way you solve each problem and explain it in a way that's (usually) easy to understand. Now, let's get this beast to hit that magic number, then surpass it as well. Great stuff. You have some mad skills. Thanks for sharing.

[@mommapanda5736]

yes... Let's get this beast to hit that magic number...

[@ocdman202]

@@mommapanda5736 Momma, I am here on Sunday morning with my coffee and donuts enjoying a little ROBOT CANTINA... yes to the magic number. 🚙🚙🚙

[@kansasrose2909]

@@ocdman202 I hope he does more un == boxingSO FUN

[@A7xnightmare66]

Love the idea of the fiero. I have two!

[@matthewrichmond5179]

The dip after the engine rpm comes up is the cvt Locking in at its lowest point and the slow ramp up is the cvt changing "gears" up to its max ratio. Great work explaining the alternator btw.

[@danielsplayhouse3804]

I could definitely say I love your videos I love the research you're doing but with that CVT that you have there if you purchase the spring to replace it it doesn't add winding tension on it it adds compression tension on it makes it a stiffer spring to press in that's how you get faster acceleration.

[@marianarcas]

thats rigthy there a stiffer sprign

[@ocdman202]

@@marianarcas I look forward to more of JIMBO OF ROBOT CANTINA..

[@kansasrose2909]

@@ocdman202 Me too of course.. Did you happen to notice that unsteady cameraman in the un = boxing part.. Poor man. so shakey. 📽📽📽

[@kansasrose2909]

Regardless of the condition of the cameraman, I would like to see more unboxings=== always reminds me of Christmas for the thrill

[@ocdman202]

@@kansasrose2909 I like un= boxing too. the thrill of birthday and Chistmas in a box.

[@CreeperOnYourHouse]

I wish the 670 came with an active balance shaft or something. That'd be amazing for ultralight aircraft use.

[@digitalchaos1980]

As always, another awesome video! I stand corrected from my comment on your last video! Honestly, I've been a tech and computer guy since I was a kid in the 80s, and also got very into mechanics and because of that, automotive electrical is where I usually shine! But, even with 30 some odd years experience, I still learn something new every day! My logic said that without an opposing field winding in that alternator, that the kill switch wouldn't make any difference in the drag. Well, I was wrong. And if I think about it, it does make sense that it would still drag even with permanent magnets, with a load on the system. Because the load is opposing the flow of electricity! That's basic electricity, so I guess I've gotten a little rusty in some areas lol 😁 But I can admit it. We are all wrong at some point! Now about the AC output, I did mention that I figured it was possible by how the windings are wired. In the end though, I learned something (or maybe relearned?) and enjoyed the challenge and the videos! 😎

[@ocdman202]

Quick opinion question, Do you think Jimbo should have a Robot??

[@kansasrose2909]

@@ocdman202 Yes, and he should name it VOLT taren.

[@ocdman202]

@@kansasrose2909

[@kansasrose2909]

@@ocdman202 Did you watch all of ROBOT CANTINA season one??

[@nathandean1687]

light toyata pickup will give plenty of room for a small engine

[@nickkordenbrock3436]

You do an excellent job of combating false viewer comments. And producing the videos. Thanks

[@thromboid]

14:04 You legend! That was one of my favourite gags from the Rugrats TV series. The removal guys talking as they carry in crates of Suzie's family's stuff: "Hey, Ed - wha's 'fra-jee-lay' mean?!" :D

[@ocdman202]

😂😂😂😂

[@kansasrose2909]

@@ocdman202 Man, I like the Rugrats too🤡🤡🤡 Frageelie... so fun.. Jimbo seems to like it too...💖💖💖

[@ocdman202]

@@kansasrose2909 Yes Rose... Frageelie is so fun. JIMBO has a great sense of humor.

[@kansasrose2909]

@@ocdman202 I do like JIMBO'S sense of humor..

[@ocdman202]

@@kansasrose2909 Me too, Did you see that freight train that races by his property... wow.

[@curtism7203]

I think what youre seeing on the first large hump is the primary weights kicking in when it reaches a high enough rpm which is causing the engine to bog back down before climbing up the the second large peak from the secondary clutch working. I think if you want to lower that first peak you will want lighter primary weights or stronger primary springs so the primary will engage sooner.

[@X7rocks]

From the graph in the first half of the video it seems like the torque driver guides could be smoothed out to keep the rpms in a similar rpm range that doesn't drop far out the powerband. A video I recently uploaded shows a what a 45 degree gear driver can do. But also shows my engine slightly out the band. Edit. I just got to the point where you're discussing the rear pulley guides 😅 I suppose I was one of the dudes mentioning this before. As for the result I believe the rear spring was too stiff. Usually heavy springs are needed for high rpms with light weights when using light scooter weights around 3.8 grams which is around 14000 rpms, I think if you can alter the guides on the rear pulley to be less steep. You'll see a more consistent rpm that keeps you in the powerband. Glad to see more uploads good sir and hope to throw in ideas you may find helpful.

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA will have another video out this weekend.

[@kansasrose2909]

@@ocdman202 Good, I am looking forward to it. 😊😊

[@JoseSilveira-newhandleforYT]

Very interesting! This made me realize the long way you have come, since you started this project (maybe I'll watch the first episodes again). It amazes me how you do all this and still have time to make real money to pay the bills - I'm sure it's not from YT earnings 🙂

[@kansasrose2909]

I always learn a little about how cars work with this channel. Kudo's Jimbo!😊👍

[@ocdman202]

You should learn something from all these comments.. Do you realize the amount of smarts these people have..??? Just sit up straight get a hair cut and pay attention...

[@kansasrose2909]

@@ocdman202 Man,, I do realize the smarts they have. Kudos to JIMBO for this channel.

[@ocdman202]

@@kansasrose2909 Quick opinion question, do you think Jimbo should have a Robot??

[@kansasrose2909]

@@ocdman202 Well, he should consider it. 👾👾👾👾

[@mommapanda5736]

@@kansasrose2909 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@bonafazius]

A Fiero would be a fun new project vehicle but I doubt that the engine bay is much larger. Mid engined cars are also quite hard to work on and the airflow to the back isn't that good.

[@dnp990]

I had an ‘88 Fiero with a supercharged 3800 V6 swap. There is a surprising amount of room. Enough to fit the 3800 engine, blower and transmission anyway.

[@bringbacknames]

The engine bay may or may not be much larger, but there are v8 Fieros, and there's at least one LS turbo Fiero. The tub is easier to modify because it's made of steel, so I think that's the reasoning behind its consideration.

[@FieroFats]

A few bolts and the entire rear cradle drops out of the Fiero. :) And there is plenty of room for a V8.

[@bonafazius]

@@FieroFats Ok guys, im convinced. Time for the Bigger Big Block Machine aka. 1/4 V8 Fiero :D

[@notsogrand2837]

@@dnp990 A 3800 Fiero is something I need to do in my life time. Currently building up a GTP with that same engine. Love it.

[@brekkurz]

So regarding your section discussing thrust loads. You would need to build a plate to adapt the transmission bellhousing to your engine regardless. Could you include a thrust bearing in that adapter plate and allow the adapter plate to take the loading from the transmission and clutch? If you then attached the transmission/clutch unit to the engine with a splined shaft with some play you could guarantee no thrust loads transfer to the engine.

[@robotcantina8957]

Yes that would work, but unfortunately there is no room to do that with the 670

[@brekkurz]

@@robotcantina8957 psh, sledgehammer and grinder can make room! Anything you cut out is weight reduction. Win-win

[@idrisddraig2]

That new motor is bigger than is street legal (660cc) in Kei cars in Japan!...they also have a HP limit of 64! Kei cars can easily top 100mph (if you remove the speed limiter ;))

[@quinnobi42]

I always sort of wondered how Kei cars managed to move at any speed with so little power. Being incredibly small helps, I guess. Though I have heard that the 64 PS limit was more of a gentleman's agreement between car companies and not something that was officially in law.

[@325-k9k]

Newer mirage 3cyl 4dr hatch weighs same as insight but made of steel and way roomier. Just needs aero mods. I get the differece in battery too.. but still a neat comparison.

[@AliceistheGoon]

Absolutely loving it! Success or fail, great entertainment. thanx, Al

[@ocdman202]

YES we are loving it also..💖💖💖 GREAT ENTERTAINMENT.. Did you watch all the episodes??

[@mommapanda5736]

@@ocdman202 I am binge watching all of season one now...

[@kansasrose2909]

@@mommapanda5736 These videos are well worth the time. I keep them running while I do housework. 😜

[@ocdman202]

@@kansasrose2909 Good. I believe JIMBO OF ROBOT CANTINA has another video out this week.

[@kansasrose2909]

@@ocdman202 I sure hope so.. I love when JIMBO I hope does more un==boxing it feels Christmas to me

[@jfolz]

670cc. That's actually more than kei-cars.

[@jasonmartin9393]

What about using a Chevy s10 small and not a hole like of plastic pretty good room that would be cool

[@HPRaceDevelopment]

I really wish people would truly pay attention and listen to you!!! no free lunch - it costs power to generate power

[@999benhonda]

Usually, when people power a manual transmission with a 212cc, they run a centrifuge clutch, then chain to a large sprocket that drives the input of the transmission....thus the load is of the type the engine can handle as the clutch force does not push on the engine's crank.

[@jdhill770]

Seems like this would have been the way to go from the start. The cvt seems to fost a lot of space and power. Not having to fabri-cobble a clutch together seems handy, until its costing a ton of power.

[@evil_me]

With the graph it would be a great idea to look at a speed vs rpm graph. This would show any slip in the belt/clutch and show the ratio changes in the cvt.

[@crissd8283]

How? It's a cvt? How would you know what the ratio of the CVT is?

[@thromboid]

@Evil Me: That's exactly what I wanted to see too. @Criss D: In electronically controlled CVTs there are usually RPM sensors on both pulleys so the ratio can be monitored at all times, and corrected as required. Trickier with a passive mechanical control system like this.

[@Real.Alpheus]

Machine the faces of the driven clutch so the pulley gap is closer together. The belt sits higher on the pulley giving you more bottom end. Look at the stock jets on the 670. They come stock with a 105 and a 108 installed. They come this way because of the different tube lengths in the stock muffler. These engines are lean as hell for EPA purposes.

[@mommapanda5736]

Thank you for this comment.. I learn so much from comments on this channel.

[@kansasrose2909]

@@mommapanda5736 Obviously there are a lot of smart people that watch these videos.

[@ocdman202]

@@kansasrose2909 quick opinion question, Do you think Jimbo should get a Robot??

[@howiefeltersnatch2973]

Please do make a Feiro a project of yours. The 2.5(iron duke) version can be found for around $500 all day. Not a lot of room back there unless you cut the "trunk" out but definitely fun cars.

[@cdj0031]

Be interesting to see a possible performance 670 built predator 670 with a supercharger or turbo in a fiero

[@R.N.GPerformance]

okay. so any time you change the secondary it slows down your shift giving you better performance through the range "AKA" SLOWING YOU DOWN. you need to put that spring back in its original location and modify the primary. you can do this 1 of 2 ways lighter weights giving you more RPM Pull ORRRRR Leave your secondary moded the way it is now and add heavier weights to the Primary giving you faster shift.

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA has a new video out this weekend.

[@TheMapleDaily]

After rewatching this and after working for a kubota shop.. Its fun to see the motor haha

[@madeintexas3d442]

I feel targeted by this intro. How did Jimbo know I needed a haircut? His gnomes must be watching me.

[@ocdman202]

The gnomes are at it again!! They can see that we are in the upright position to watch JIMBO OF ROBOT CANTINA 🧙‍♂🧙‍♂🧙‍♂🧙‍♂

[@mommapanda5736]

@@ocdman202 Yes I know what you mean by targeted... Just need a haircut also. Are the gnomes out again??

[@kansasrose2909]

@@mommapanda5736 Momma, I went out and got a haircut for this but I didnt even need one.

[@ocdman202]

@@kansasrose2909

[@kansasrose2909]

@@ocdman202 I see your reminder to watch the upcoming video!

[@Austin-gi2ci]

I don’t know what the odds are but I just got back from my haircut while pouring a bowl of cereal turning on episode of robot cantina and you come at me with that intro I can’t believe it

[@ocdman202]

Oh my gosh.. what are the odds... You should take that to Vegas and bet on it. You would win the JACKPOT. 💥💥💥🎇🎇🎇🥂🥂🥂🥂

[@mommapanda5736]

@@ocdman202 This is beyond coincidence.. You say you just got back from the haircut... was it Cap'n Crunch by chance..?? What are the odds?? you can take that to the bank and bet on it... WOW

[@ocdman202]

@@mommapanda5736 I just got my haircut... And I am in the upright position... Have a cup of coffee in my hand to watch ROBOT CANTINA..☕☕☕☕☕

[@kansasrose2909]

@@ocdman202 That's great. I hope you enjoy your coffee.

[@Ian-of9oi]

You make great videos. As someone who tinkers myself I know what it’s like to spend many hours to months working on a problem then have someone show up and tell you you’re doing it wrong after only knowing about it for 3 minutes.

[@Rattus-Norvegicus]

What's worse is when they're right. Talk about 🤦‍♂️

[@otm646]

Spending many hours or months gives you less and less perspective. It becomes a massive detriment to your engineering performance. You gotta step back, let other people in to have a look and point out of you've done something silly or overly complicated.

[@ocdman202]

@@otm646 Do you think Robot Cantina will have a new video this weekend?

[@kansasrose2909]

@@ocdman202 My Goodness I hope so.. I am jonesing for a new video of ROBOT CANTINA.

[@mommapanda5736]

@@kansasrose2909 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@brandonn2538]

Time for a power bulge in the hood! Seeing as how it doesn't really matter what trans you run, I'd look for something small and as close to the same length as possible and swap them. That's at least for when the 670 makes it here. I'm excited for the diesel, it actually has the most potential for fuel economy. Although I doubt it will have much top end.

[@kansasrose2909]

🚙🚙🚙🚙🚙

[@ocdman202]

@@kansasrose2909 Rose, I think JIMBO will have another video out this weekend... I hope

[@kansasrose2909]

@@ocdman202 I sure hope so. 🌹🌹🌹

[@TheStuartstardust]

I like the CVT approach. Was just thinking - is it not possible to move that clutch thrust bearing to tha shaft itself? 🤔 Then that would not be the issue at least 🙃🙂

[@GUE5TPA55]

@14:25 Scissors go flying across the shop killing a shop knome Enter Godzilla the only "BIG BLOCK V TWIN YOU WILL EVER NEED".

[@gregkotoch2765]

1. Why aren't you working as an engineer for some big automotive manufacturer? 2. It would really be nice if you could get a proper pulley in and then do a baseline with that before you put the supercharger on so we can know exactly what difference it makes. 3. Thanks!

[@TJPDmember]

you also need to data log the speed and map it against engine rpm. this will give you an idea of acceleration vs rpm and accel vs time/speed

[@randallthomas5207]

Auto transmission torque converter with electric lock up, instead of the clutch, and flywheel. No thrust to the engine. Should do the same thing as the CVT without the space consumption. Kind of like the weird “automatic” automatic tranny on the last 60s Beetle which you had to manually shift. Alternatively you could look at an engine and tranny from a 2-wd Kei truck. Since you’re hitting the 660-cc Kei class limit. It starts to make sense. Still lots of fabrication and mods required.

[@mommapanda5736]

Thank you for this comment... I really learn so much from the comments on this channel. .

[@kansasrose2909]

@@mommapanda5736 You and I both are learning alot here.. 💖💖💖💖💖

[@ocdman202]

@@kansasrose2909 Just sit up straight and pay attention.

[@iowaphotos9107]

Jimbo, I have a Kubota G5200H Hydrostat tractor it's a 16HP 3 cylinder diesel and an Allison hydrostat. you could couple something like that to either engine and go WOT on the engine and modulate the Hydrostat to whatever speed you wanted. If you included a Sprag clutch between it and the transmission you could shift. Have to have this as hydrostat's don't coast. This would also eliminate the thrust issue a clutch causes on the engine case. The hydrostat would provide a more linear torque curve as the engine would always be in it's power band.

[@ocdman202]

Wow, I sure hope JIMBO reads this comment. I believe he has another video out this weekend. 😊

[@kansasrose2909]

@@ocdman202 The question is == will it go any faster?

[@kansasrose2909]

Looking forward to more videos from Robot Cantina!

[@mommapanda5736]

@@kansasrose2909 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@number40Fan]

If you think you're having clutch problems now, wait until you add power. I would have tried 4th gear after the spring change.

[@ocdman202]

[@kansasrose2909]

@@ocdman202 Man.. what is that little green thing at your finger tip for??

[@kansasrose2909]

I feel I am lucky to have never had clutch problems. Some mechanics seem to specialize on those issues.

[@ocdman202]

@@kansasrose2909 Reminder... I thinks Jimbo has another video out this weekend.

[@jamest.5001]

Get one of those 1000cc v twins like Redbeard showed the other day, that should be nearly powerful as stock, haha, I'd like to build a ev from a car like this,

[@FAB1150]

I'm not an expert at all, but shouldn't the CVT ideally keep the engine at a fixed RPM or in its ideal power range? It looks like to me that it's getting into "high gear" too fast and slowing the engine down because of it. It should climb fast in the lowest ratio, then start getting to the highest ratio keeping the engine at high-ish RPM and then start to let the engine keep climbing until its highest RPM Again though, I'm not an expert at all and this is just what I intuitively understand about CVTs just by watching videos like yours of people using them, haha

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA will have another video out this weekend.

[@AsekiBekovy]

The IDEAL cvt would be electronically controlled to only allow max power rpm on kickdown and to adjust ratio depending on how much the accelerator is being pressed. An ideal engine cvt system would try to keep rpm low with high engine load to keep the engine in a high efficiency range as long as you do not need much power (only works with drive by wire)

[@FAB1150]

@@AsekiBekovy right, but if we're just trying to get the fastest 0-60 (or 50, haha) it wouldn't necessarily matter to get the highest efficiency, right?

[@AsekiBekovy]

@@FAB1150 True, but to achieve that you would also want a transmission with as minimal losses as possible, so maybe not a CVT at all? 🤔 When I think about the horrible fuel consumption of an old 50cc scooter (52 mpg) I had and compare it to my chain driven 286cc single cylinder motorbike (76 mpg) with 9 times the power output, I can only imagine that small "stupid" CVTs are not the most efficient thing imaginable...

[@MatthewHolevinski]

Ready for that haircut, and spring time in Kansas. Time to get some good fishin' done.

[@ocdman202]

Yes, spring time in Kansas.. How much does it cost for a fishing license in Kansas??

[@mommapanda5736]

@@ocdman202 Fishing license??... How much does a haircut cost in your neck of the woods??

[@ocdman202]

@@mommapanda5736 Haircuts run around the twenty dollar range...

[@johnalexander4356]

Great content. I really enjoy watching these videos and seeing the progress, and problems. It looks like you'll have to do some serious chopping on the bellhousing and more. Wish I could help out, I love the challenges and the satisfaction gained by overcoming them!

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA will have another video out this weekend.

[@kansasrose2909]

@@ocdman202 Great, I am looking forward to it. Jimbo really gets into the details.

[@ocdman202]

@@kansasrose2909 quick opinion question, Do you think Jimbo should have a Robot??

[@kansasrose2909]

@@ocdman202 I don't know... but he should consider doing some podcasts with his smooth delivery. Now that is a good idea.

[@member57]

Maybe engineer a thrust bearing adapter between clutch and engine?

[@d3faulted2]

Looks like the engine is revving faster than the pulley can shift. Making the spring tension higher will make it shift slower. CVT's are a interesting balancing act. You can cause faster shifts by increasing the weights in the primary or decreasing the secondary's spring tension. The issue with decreasing the spring tension is you can get slip in heavier applications. But if you go too heavy on the weights it will try to engage as soon as you start the engine. I would try to go a little lighter on the secondary spring and a little heavier on the weights.

[@kansasrose2909]

I really like this detailed comment.. And I like how JIMBO really gets into the weeds and explains things.

[@modelnutty6503]

670 into jack-shaft that can handle the clutch's thrust load maybe? functional clutch would be very nice, not a lot of room to play with but may be able to keep the CVT, gear/sprocket tall enough from that to make use of 1st+2nd+3rd+4th?

[@lawrenwimberly7311]

that 670, and a snowmobile or golf cart cvt will get this thing daily drivable

[@davidjernigan8161]

If you go with the 670 maybe fab a 2 into 1 header into the exhaust system. Cars and Cameras nodded one of these for their drag rail.

[@YurtFerguson]

A 3 cylinder turbo diesel fiero would be absolutely astounding.

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA has another video out this weekend

[@kansasrose2909]

@@ocdman202 Great, I am looking forward to it.

[@michaelbenoit248]

You should get a little Toyota Camry, & drop the dsl in it.

[@PistonAvatarGuy]

Astoundingly slow.

[@DavidAbella]

Hello sir, would you consider installing a manual transmission? I think that the actual transmission does not take all the power out of the engine.

[@mommapanda5736]

This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@draggonhedd]

Suggestion for another car: 90s saturn SW or SL, they are EXTREMELY lightweight ,and are a steel frame under that aerodynamic shell.

[@ocdman202]

🚙🚙🚙🚙🤓

[@robotcantina8957]

Yes, we are looking for one that local and has a manual transmission.

[@draggonhedd]

@@robotcantina8957 1st gen ones are the lightest but 2nd gen are still flyweight.

[@ocdman202]

@@draggonhedd I believe JIMBO OF ROBOT CANTINA has another video out this weekend.

[@kansasrose2909]

@@ocdman202 I sure hope so.. 🌹🌹🌹

[@MOOGSTINE]

This is wonderful I love these films

[@kansasrose2909]

LOVE THAT JIMBO...💖💖💖💖 ROBOT CANTINA.🌹🌹🌹🌹

[@ocdman202]

@@kansasrose2909 Kansas Rose... I can see you are fond of him.

[@kansasrose2909]

@@ocdman202 I really love these videos , but what is up with that cameraman.. toward the end of the video??

[@ocdman202]

@@kansasrose2909 The cameraman has a history of fluid in the ear or possibly shaken baby syndrome

[@mommapanda5736]

@@kansasrose2909 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@testube66]

Fiero would be GREAT!! And contrary to popular belief, they have an enormous engine bay. People have shoved everything from 500 Cadillacs to big block Chevys and even a few diesels in those things. I have one that had a small block Chevy in it (very common swap) but now has a 3.4 DOHC Chevy V6 in there.

[@mommapanda5736]

Why do you think the Fiero has a big engine bay?? Was it made for the interchange?

[@kansasrose2909]

@@mommapanda5736 I dont know .. It sounds like they can fit everything in there but the kitchen sink 😜😜

[@ocdman202]

@@kansasrose2909 Kitchen sink??? now that doesnt go in a car!!🎆🎆🎆🎇🎇🎇

[@kansasrose2909]

@@ocdman202 I also think a fiero would be great.. Lets see what happens next. 😊

[@scootersonlyrepair6773]

@Jim McIntosh jigawatts.

[@Celician83]

Another car that is made of aluminum and plastic that has more room under the hood, and is very aerodynamic is a 90's Saturn SL. Can be found for VERY cheap, and generally either has engine or transmission issues, pick your poison.

[@robotcantina8957]

Actually, I'm a big fan of the Saturn S series, awesome cars. My daily search includes Saturns. The twin cam SL2 with a manual has a close ratio transmission to boot. Saturn's used to be all over, but here in my part of Kansas they don't show up on CL or FB ... If I can find the right combo locally, that would be a winner

[@Celician83]

@@robotcantina8957 as far as SL's go, you'd be better off looking in JY's or sitting in people's driveway rather than looking for people selling them. Finding a twin cam model for your projects may be even more difficult, since they were scarce to begin with. You'd probably want a 94 or 95, due to emissions laws.

[@mommapanda5736]

@@Celician83 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@Celician83]

@@mommapanda5736 7 months later and now we know Jimbo took my advice! Who woulda thought!

[@jimmystikx]

If you were to add the thrust bearing to the adapter plate, between the engine and transmission, wouldn't that work? Something like a Ford 9 in end cup. I vote a mini truck for the next version.

[@robotcantina8957]

Yes, adding the bearings to the adapter plate would work. We are looking into a few options, but our main concern is where to find the space to fit all the stuff into. WE need to find a few inches to make everything work.

[@ocdman202]

@@robotcantina8957 Yes to more videos.

[@mommapanda5736]

@@ocdman202 This Thanksgiving, I will count my blessings twice... once for the ROBOT and once for the CANTINA== jimbo! please keep these fun and entertaining videos coming...

[@JoeHynes284]

i work with plenty of engineers who refer to the thin under the hood of a car as a motor :)

[@dsxfab3747]

Wow weird I’m literally eating Cap’n Crunch and I’m going to get a haircut today, no joke

[@ocdman202]

That is an amazing coincidence...I like Cap'n Crunch too...🤓🍜🍜🍜

[@mommapanda5736]

@@ocdman202 I lot of us cut our own hair during the pandemic and it showed... But at least it looked a little better... I did'nt do my own dental work however...

[@ocdman202]

@@mommapanda5736 I sure hope Jimbo has another video out this weekend.

[@leifhietala8074]

The little diesel engine was also installed into tractors, including ones with manual transmissions. It can take the thrust load.

[@kansasrose2909]

Tractors??🚜🚜🚜🚜🏕🏕🏕 We love tractors here in Kansas.. By the way that diesel engine doesn't look that small... Did you watch till the end? That un = boxing was neat.. But what is up with the cameraman??

[@ocdman202]

@@kansasrose2909 Yes Rose , what is up with the cameraman? he has a balance problem... Save the cameraman...

[@ocdman202]

Man... I am trying to come up with a differential diagnosis on the cameraman but for now do not throw him under the bus.

[@kansasrose2909]

@@ocdman202 What in the world is a differential diagnosis?? Is the poor cameraman back on his feet??

[@ocdman202]

@@kansasrose2909 Did that cameraman play football as a youth.. could be a concussion syndrome.. poor man.

[@tblosser8921]

From my experience on the 30 series the driven spring needs to be closer to 1/2 a turn tighter as well as lighter weights AND springs in the driver (keep the engagement rpm the same) will affect the ratio curve much better. The stock 30 series on my built 212 would blow through the driven spring (pull the belt down in the driven at low speeds and then slip) but now with those mods it engages at 2800 and holds 4400 through the ratio curve. Also the lighter driver weights and springs is info from a comet manual.

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA will have another video out this weekend,

[@kansasrose2909]

@@ocdman202 💖💖💖

[@ocdman202]

@@kansasrose2909 I have my coffee cup ready.

[@Acc_220]

80s/90s Nissan D21 would make a great secondary test bed…

[@kansasrose2909]

Test bed..??. It is time to get out of bed and get a hair cut🤠🤠🤠

[@ocdman202]

@@kansasrose2909 At least get out of bed into the upright position.

[@kansasrose2909]

@@ocdman202 Yes... Time to get out of that bed and sit up straight to watch ROBOT CANTINA...

[@ocdman202]

@@kansasrose2909 I got a haircut at the suggestion of Jimbo of Robot Cantina.. I hope it lasts me a few weeks.

[@Acc_220]

Sorry, secondary “project car”.

[@patchouli3422]

Makes me wonder how comical it would look to put a DuroMax XP35 in that engine bay. It's hilarious enough seeing a 670 in there.

[@LucasBell420]

14:34 homeboy casually throws a razor at his cameraman

[@mommapanda5736]

does he need a haircut and a shave???

[@LucasBell420]

I think so

[@dangerousdave5915]

Yeah, I saw that too. #SaveTheCameraman!

[@swecreations]

Half the fun is you doing it to one of these light efficient cars, something like a Prius or Insight or Geo Metro. I would definitely watch a video or two where you strip them out to under 2000 pounds.

[@herrjonna2007]

Swapping the car would be awesome, but honestly, trying to cram as much power out of small engines in undersized engine-bays is one of the most important reasons I watch these! The challenge leads to creative engineering solutions, and THAT is worth watching! Anyways, good luck with the stupid-charger!

[@kansasrose2909]

The creative engineering solution is important, that is worth watching, especially considering the price of gas now.. ⛽⛽⛽⛽⛽

[@ocdman202]

@@kansasrose2909 Rose, isn't gas still pretty cheap in Kansas??

[@kansasrose2909]

@@ocdman202 I guess so, but for how long?😛😛

[@ocdman202]

@@kansasrose2909 Quick opinion question= Do you think JIMBO needs a Robot??

[@kansasrose2909]

@@ocdman202 We all think Jimbo needs a Robot...

[@ChatNoirLe]

Could attach the CVT to a pedal, then you could manually stay in the peak power point, though accel times get a bit more inconsistent.

[@colinhamer6506]

good idea but instead of a pedal have actuators and a ECU do the work peak power is the key and CVT makes sense adding extra control to it seems to be overlooked

[@ajl9491]

Maybe just put a civic 2.0 4 cylinder in and be done. Excellent gas mileage good performance

[@nickgustafson9855]

670 is a rideon lawnmower engine. Maybe the next step should be to add a mower deck to the honda.

[@replikvltyoutube3727]

The dip looks like bite of clutch actually, and rpm lowering - good clutch engagement and work. The "peak" seems the slippage.

[@ThePa1ch]

The peak is max rpm in lowest cvt gear, then the cvt starts shifting...

[@replikvltyoutube3727]

@@ThePa1ch yes, you are right 👍

[@morpfrank4709]

About the difference between motor and engine I always refer to them kinda like rectangles and squares, all engines are motors but not all motors are engines.

[@actiniumanarchy9237]

PMG FINALLY MORE VIDOES IN THIS!! I THOUHT ID SEEN THE END🤩🤩🤩

[@ocdman202]

I believe JIMBO OF ROBOT CANTINA has another video out this weekend.

[@kansasrose2909]

@@ocdman202 I am looking forward to it.. coffee cup in hand.

[@danielsmith-ze3wy]

Thanks for making the video , all research, keeping keeping it enjoyable while being informative

[@mommapanda5736]

I enjoy these videos as well. He does seem to do a lot of research and keeps it enjoyable..

[@ocdman202]

@@mommapanda5736 That research must take a lot of time and energy.. .What do you think he will do next?? I did see a couple of motorcycles in his studio.. 🚴‍♀🚴‍♀🚴‍♀🚴‍♀

[@mommapanda5736]

@@ocdman202 It makes me wonder what he will research and do next....

[@kansasrose2909]

@@mommapanda5736 I am learning so much from these videos and comments 💖💖💖💖

[@ocdman202]

@@kansasrose2909 Rose, just grab a good cup of coffee and pay attention.

[@jasonmartin9393]

I have a cushman vanster with 22 hp it just like a car it has a clutch and everything it work good

[@christucker3049]

After the honda is done. put the 670 in a 4x4 pickup.

[@flyingpeter]

we are reaching trabant levels of power! one idea thought, how about replacing the manual transmission and the external cvt for the cvt out of a car, like a nissan or another honda, maybe the less drivetrain parts could help to acelerate faster

[@GamertagO1]

Hahaha nice “A Christmas Story” reference.

[@BertOber]

Hi Regarding your c.v.t. workings. Your first graph, @ 5:53(in the video) the initial peak to half way aprox is c.v.t gripping the belt and slipping. Then the rpm stays stable untill the RPM of the engine and r.p.m. of the c.v.t. match up. In that period the c.v.t. still slips. From the moment of lock up of the belt in both sides of the c.v.t. your r.p.m. and speed will rise together. That's the rise to near max rpm. 24 seconds into the graph aprox. From that point on the r.p.m. slows and the speed increases meaning the ratio between engine and tires are changing thus that is the point where the c.v.t. is shifting. As soon as the c.v.t. has reached it's final ratio the r.p.m. of the engine and speed of the vehicle will rise again together. I have made some data file for doing my own calculations on the c.v.t. of my Track T-800cdi motorcycle. I'll be glad to assist. If you could give me your wheel diameter, and c.v.t. ratios (or diameter of belt @ start and end ratio) then i could plug in the numbers.

[@mommapanda5736]

Thank you for this well thought out comment.. I learn so much from comments on ROBOT CANTINA..

[@robotcantina8957]

The overall transaxle drive ratio when using 3rd gear is 5.23:1 That includes the chain drive. The Comet 44 series drive system multiples that by 2.43:1 on the low end and goes to 1:1 on the high end. The wheels are 22.4 inches in diameter.

[@BertOber]

@@robotcantina8957 Based on calculations of ratio's and r.p.m's you would have been driving 15mph when the c.v.t locks up. Then at 22.26mph your c.v.t. starts to shift, causing your r.p.m to drop as your speed increases. at 3266 rpm with 1 cvt ratio should be 41.86 mph, afterwhich you accelerate to 50mph.

[@willgilliam9053]

anything can be fixed with a diesel engine, turbocharger, and a EGT meter :)

[@gusweiss952]

Get I tiny truck for the diesel like a ford ranger splash

[@Senatorlemonsouth]

Very fun video i appreciate your dedication to such fun nonsense

[@HA05GER]

Do these not have like some kind of weighting controller like a scooter CVT . Adjusting the weight on the input side to make the revs climb higher before riding up the gearing. Realistically the rpm should be pretty flat across the range until the gearbox(CVT) tops out

[@shbrou2103]

If you need a cheap Fiero, I know where 3 of them are sitting in a junk yard, plus one of them is a manual.

[@ocdman202]

This is mighty tempting... and intriguing as well.. I sure hope JIMBO OF ROBOT CANTINA reads all these comments... If it were me I would want to know where to go to all the good junk yards.. Do you have pick a parts in your area... I love those.

[@kansasrose2909]

@@ocdman202 Man, I think it is called "pick and pull" or Pull your part, where you can pick your stuff at the junk yard. I love to wander there in my spare time. 💖💖💖💖

[@ocdman202]

@@kansasrose2909 Rose, I have been to many a junkyard I enjoy just wandering around them myself.

[@kansasrose2909]

@@ocdman202 You can find some pretty good stuff at the junkyard.

[@ocdman202]

@@kansasrose2909 I think we have one of those pick up parts places around here.

[@waldojim42]

It's funny, I realized there were differences in design for those small engines, I just never understood they why of it. Thanks for the info on the bearings.

[@AgneDei]

Perhaps try a small hydraulic torque converter (from an automatic transmission) instead of a clutch. It shouldn't have much thrust force on the crank (without an additional lockup disc clutch), would still do a bit of the torque multiplying job when launching the car, but at the same time it would work way better than the CVT.

[@ocdman202]

🚙🚙🚙🚙🤓

[@kansasrose2909]

@@ocdman202 Man, did you notice that cameraman was a little unsteady at the unboxing?? What is up with that📽📽📽📽??

[@ocdman202]

@@kansasrose2909 I dont know but I think JIMBO OF ROBOT CANTINA has another video out this weekend.

[@kansasrose2909]

@@ocdman202 I sure hope so. 🌹🌹🌹🌹

[@nodrug2]

Great video, too bad time has to be used to explain (sometime obvious) things.

[@TheJBftw]

Getting more cc with every episode series! Love your work.

[@WhitfieldProductionsTV]

91-96 ford escort LX. would be a good choice.

[@johnhershey4010]

I'm glad you're doing a 670cc engine on it.

[@802Garage]

Diesel hyper miling Fiero would def appeal to me.

[@thedude7726]

Cant wait to see the 670 in this beast

[@taurbaby]

Maybe you could consider a yugo for your next project car... anything on those would be a major improvement!

[@Drev222]

I love the fact that you explain everything in detail, and try suggestions from the crowd. I had an idea, but not sure how much difference it would make for you. Have you thought about swapping out the OEM lighting for LED, to cut down on power draw? I only say this because I have upgraded my last few cars all to LED lighting. I had to put cheater adapters on the one car, because it wasn't seeing the draw expected, and was throwing warning lights. I am not sure if it would make enough difference to help, but figured I would mention it.

[@aimlessweasel]

He already has the bypass switch to disengage the alternator, so there would be no benefit.

[@Drev222]

@@aimlessweasel Yes, but the lighting will still be on when that switch is flipped(time and weather dependent), draining power from the battery. So even with the switch off, the lighting would play a factor in the power drain, even if it is slight. When every little bit counts, I felt that it is worth pointing out.

[@reverse_engineered]

@@Drev222 It's draining power from the battery, not the engine, so that won't affect engine performance, just how long he can run without the alternator engaged, which isn't a limiting factor.

[@Drev222]

@@reverse_engineered the vehicle has more power draw than just the engine. When the switch is turned off, the battery is taking the full brunt. If voltages dip on the various sensors, that could cause issues with engine performance. My guess is that this insight build has minimized the power draw as much as possible, but they still need to exist to keep the vehicle somewhat legal. As I originally said, I don't know if it would make that much of a difference. It was still worth mentioning

[@robotcantina8957]

Really good suggestion, We don't use the lights, they are there because they are required to be street legal.... but I think it would be cool to switch everything over to LED and see how much power we save. Look forward to that in a future video.